Node unit of distributed antenna system

摘要

The inventive concept relates to a distributed antenna system (DAS), and more particularly, to an uplink signal transmission operation of each of node units constituting a DAS. A node unit of a DAS includes a signal input/output unit configured to receive m uplink signals from m lower node units and output the m uplink signals, and a multiplexer configured to generate a single uplink signal by selectively outputting any one of the m uplink signals at an interval of a predetermined output time. Accordingly, it is possible to provide a DAS capable of processing and outputting, as one signal, uplink signals received from a plurality of remote units, without any error.

主权项

1. A node unit of a distributed antenna system, comprising:
a signal input/output unit configured to receive m uplink signals from m lower node units and output the m uplink signals, where m is a positive integer greater than 1; a multiplexer configured to generate a single uplink signal by selectively outputting any one of the m uplink signals at an interval of a predetermined output time; a filter configured to output an image eliminated signal by eliminating an image signal from the single uplink signal; and a down-sampler configured to output a transmission target uplink signal by converting a sampling rate of the image eliminated signal to correspond to a sampling rate of any one of the m uplink signals.